Successful currencies meet three criteria:

(1) they are in widespread use as medium of exchange
(2) they serve as unit of account
(3) they are a stable store of value.

Most sovereign currencies fully meet all three criteria.

What about Bitcoin?

The market is finally showing some weakness after a wild post-election stock market run-up, and it's taking Bitcoin with it. At least so far.

Three years ago, Bitcoin was under $400, a price I thought was too high even then. As far as I'm concerned, Bitcoin has no intrinsic value and should be worth nothing. So why does anyone think it's worth thousands (and in some cases, millions) of dollars?
It's the theory of false scarcity. There are a limited number of bitcoins in the world and the usage of blockchain technology has assigned the ownership of each coin to specific wallets owned by individuals. So to take "ownership," I have to use the universal blockchain mechanism, accepted by all as valid, to transfer a coin.

Germany recently approved bitcoin, why exactly is the approval required and what will happen after approval ?

To the surprise of nobody, Warren Buffett isn’t interested in Bitcoin at all.
Warren’s strategy is to have an adequate but consistent return over a long period of time.
The key is that he knows he will be rich someday, but he is not in a hurry.
In cryptocurrency world, it is not possible to make a position and forget it for x number of years. Hence, it does not fit Warren’s style.
So what is your opinion?

While there are several nations which are passing laws against crypto world.  Thailand has entered the list of the nations which have legalized crypto currency.  Thailand is mainly dependent on tourism industry.  So I think it is wise decision on t he part of a country where major source of income is from tourism.  So it will attract more tourists to this country.
It will benefit a lot to the country and is healthy signal for the health of Bitcoin family.

The first purchase using bitcoins was in 2009 when someone bought 2 pizzas for 10,000 bitcoins. Today, that would be worth $83,746,850. Many people have started to use Bitcoin and it is now the most popular cryptocurrency in the world. Many countries whose currencies have become hyperinflated have thought about switching their national currency to Bitcoin. For something to be classified as money, it needs to be a good unit of account, medium of exchange, and store of value. Since Bitcoin has become extremely popular, I wanted to explain to investors and Bitcoin users that Bitcoin isn't a legit currency. The main three reasons why Bitcoin isn't a legit currency is because it is a poor unit of account, medium of exchange, and store of value.
   One of the big three parts of a currency is that it is a good unit of account. For something to be a unit of account, people have to be able to compare its price to the prices of alternative retail goods. Since the value of a bitcoin changes so much, it would be hard and confusing for both the consumer and the seller to recalculate the prices every day. “Because the value of a bitcoin compared to other currencies changes greatly on a day-to-day basis, retailers that accept the currency have to recalculate prices very frequently, a practice that would be costly to the merchant and confusing to the consumer.” This quote from David Yermack’s article Is Bitcoin a Real Currency? An Economic Appraisal Bitcoin shows why Bitcoin isn't a good unit of account. That is one reason why Bitcoin can't be a form of currency and why Bitcoin isn't a legit currency.
   The second part of something that is classified as a currency is that it is a medium of exchange. A medium of exchange is an intermediary instrument used to facilitate the sale, purchase or trade of goods. Since bitcoin doesn't have any intrinsic value, so its worth is held up by its usefulness as a currency in the consumer economy. The Youtube video “Why Do Banks Fear Bitcoin” by VisionVictory explains that there is a set amount of Bitcoins and by the year 2140, there will be a total of 21 million bitcoins. Miners have already mined 11.9 million of them, and this means that there is only 9.1 million left. Once all of it is mined, there won’t be any more left to be mined. Dollar bills can be printed by the U.S. government if they were needed. Some more reasons why Bitcoins isn't a good medium of exchange are that Bitcoins transactions each take around 10 minutes each, which is very slow compared to using a credit or debit card, which takes a few seconds. Also, Bitcoin transactions can cost around $20, which is extremely expensive. Because of all of these reasons, Bitcoin can't be a good medium of exchange, which is very important if it were to be a legit currency.
   The third and final part of a currency is that it has to be a good store of value. A store of value means that the function of an asset that can be saved, retrieved and exchanged at a later time. In the long podcast on Youtube by Paul Vigna & Michael Casey: ‘The Age of Cryptocurrency’, they explain what a decentralized currency is. Bitcoin is an atrocious store of value and one of the reasons why is because of its constant hacking attacks and other security problems. This is mostly because Bitcoin is decentralized, which means that there is no central authority that can stop any Bitcoin transaction or any hacking attempts. One of the reasons why Bitcoin is so popular is because people can stay anonymous and make transactions without people knowing who they are. The downside of using a decentralized currency is that people can do illegal things anonymously and get away with it. And also, Bitcoin’s exchange rate has no correlation at all with any other big currencies like the Dollar, Euro, and Yen. This makes Bitcoin extremely risky to use because it is tethered to any other currencies so its’ value would change constantly. This shows how terrible of a store of value Bitcoin is and why it cannot be a legit currency.
   Tons of people are jumping on the “Bitcoin Bandwagon” without doing their own research on it, and they’re going to lose a lot of time and money because of this. They need to realize that Bitcoin is not a legit currency because it fails to be a unit of account, medium of exchange, and a store of value.

I was reading the Speculation section from the Economics forum yesterday, and two guys from the BTC Foundation said that 2018 will be the last time that Bitcoin will be under $10,000. I believe that this statement was made to lessen the worry that comes about every time that BTC drops. I don't know how anyone could make that statement in full faith though, as the nature of altcoins is its very volatility. Since it is not tied to normal economic conditions as fiat currency is, I don't quite see where that prediction comes from. The fact that many economies are talking about some type of oversight does show that acceptance is gaining and perhaps is a harbinger of more stable, and higher, prices.

Let's consider this :

Governments cannot stop Bitcoin by stopping the technology, but they can kill the interest that people have in buying bitcoins. Could governments with the help of Banks, be behind this falling price?

Last year we saw a huge increase in the price and I was thinking that it could have been a collective buying strategy by Banks to buy a lot of coins for a synchronized dump in 2018.  

If the Banks bought a lot of coins last year at the beginning of the spike from $1000 and they triggered a buying frenzy, then most of the more expensive coins would have been bought by the public. So they might just have bought coins to trick other investors into buying more coins.

So what is their goal? Their goal will be to break the demand for Crypto currencies and Bitcoin, by gradually dumping the cheap coins that they bought at the start of last year and pushing the price down. <Like what is happening now>

They know investors will have bought at the higher end, say $10 000 to $19000 and these people would probably have lost money, when they started dumping in 2018. They saw that "demand" for Crypto currencies increased, when there is a constant increase in the price and they are now creating a constant decrease in the price to break people's confidence in the technology and also the demand for the coins.

They will obviously use untraceable methods to do this, because the Banks are helping to hide the origin of this money.   They can only print a few Billions more to execute this strategy and this will go unnoticed, because it is toilet paper money.  

This is the only logical reason why we are seeing a constant decrease in the price, in spite of all the good progress that we have made. It also explains the large spike in the price in 2017.

Hodl on guys and gals, do not be tricked by these cheap tactics. <If this is true>    

As per my knowledge, Some investors invest in bitcoin when the price reach to 20,000$ but now price is hardly more than 10000$.
Should they loose their money?
But still investors are invest in why ?

Before this time, almost Korean investors really worried about new tax policy for cryptocurrency.
That's why all news said the government will apply 3~40%taxes for crypto at Jul~Aug.
But today, the government said we will apply 10~15%taxes for crypto like interest income tax, and it is very acceptable to all Korean investors.
Also they said we feel hard to say it will happen within this year and although will happen this year, there will be 1~2years stay period.

http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&oid=023&aid=0003382087&sid1=001&lfrom=kakao

In conclusion, Crypto is accepted by government's legal property, SO MANY KOREAN INVESTORS WILL GET INTO MARKET AGAIN!

So many countries now were prohibiting the use of virtual cryptocurrencies. And to think that many unemployed individuals were beginning to uplift their way of living because of their dealings with cryptocurrencies. Banks doesn't expressly say why it is banning the use of Bitcoin.
What do you think is the reason behind this?

Because bitcoin is still not legal all over the world. The reason behind it is the different flaws that bitcoin still face right now and one of it is its decentralized market which gives its users an anonymous transactions that is also being abused by some by using it in illegal ways. Second is its unstable price, because we now that the bitcoin's price really changes drastically unlike the accepted currencies that only changes a bit.

I think it is really common, not all the times it will goes up,
there are some circumstances that part of the process and cannot be avoided, instead of being worried just stay calm.

I think Maybe they have strong evidence about illegal activity or transactions in Bitcoin and they do not want your country involved. and for whatever reason your State has, you can do nothing but obey. and hope that one day they will not ban Bitcoin anymore.
Maybe your country received a lot of negative feedback about Bitcoin and they just protect every citizen in it.

Both forms of investment have risks.

At the bank there is the Deposit Protection Fund, this is worth nothing if the banks remain closed in a crash. Nobody can then take off from his account to buy food, for example.

In such a case, you can do more with Bitcoin on his phone.

However, the Bitcoin is very volatile and therefore not well suited as an investment.

Therefore, you should be broad and have something of every investment.

Only time will tell if there will be any other altcoins that can overtake Bitcoin in the nearest future. As for me, i don't believe that any alternative crypto currency will be able to replace Bitcoin.

I didnt knew doge were made for fun, but it is beauty, small fees are assured with doge due to its low value, we can moove milions with small fee, something bitcoin were supost to do as well. Besides those doge is one of the best coins to trade because due to its low value we can proofit with 1 satoshis up, its insane one of the best coins for trading.

If you really believe to a specific coins you may choose few. But its better to hold more as long as you can monitor  those coin or you can mange it, keep that in mind that tou may choose a coin that has a big potential to pump. Make your own research about the coins before investing.

please be advised maybe people who easily panic using emergency money for trading and still do not know how good and correct trading, that's why bitcoin education is very important.

i think china can not controlling bitcoin and impossible to control it the china is a big country and big percentage if the bitcoin ban in china the value of bitcoin is down to low.